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3.11.18 Fuel injection nozzle
(1) Feature
The semi-long type hole-nozzle is used with the direct
injection combustion chamber.
Fuel from the injection pump enters through the oil port
in the nozzle holder, and enters the nozzle body reservoir.
When oil reaches the specified pressure, it pushes up the
nozzle valve held by the nozzle spring, and is injected
through the small hole on the tip of the nozzle body.
The nozzle valve is automatically pushed down by the
nozzle spring and closed after fuel is injected.
Oil that leaks from between the nozzle valve and nozzle
body goes from the hole on top of the nozzle spring
through the oil leakage fitting and back into the fuel tank.
Adjustment of injection starting pressure is effected with
the adjustment bolt.
(2) Nozzle specifications
Engine model
6CXM-GTE
Type
Nozzle No.
YDLL155S296CZ
Yanmar part No.
127672-53000
Valve seat
Operating pressure
23.5
No. of injection
holes
injection
hole dia
Injection angle
Valve lift
6CXM-GTE2
Semi-long type hole-nozzle
YDLL155S306CAZ
127694-53050
Single cone
0.49 MPa (240
5kgf/
6-0.29
6-0.30
155
0.25 mm
0.30 mm
cm
2
)
- 3-43-18 -
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